Improvement in rotary blowers



tluited tant @met A Gemine.

HENRY O. MCILWAIN 'AND ALONZO BRUMFIEL, OF OONNERSVILLE,

INDIANA.

Letters Patent N 103,482, lated May 24, 1870.

IMPROVEMENT IN ROTARY BLOWERS.

lhe Schedule referred to in these Letters Patent and' making part of the same To all whom yit may concern:

Be it known that we, HENRY O. MCILWAIN and ALONZO BRUMFIEL, of Conncrsvillc, in the county of Fayette and State of Indiana, have invented a new and useful Improvement inA Rotary Blower for Furnaces and other purposes; and we do hereby declare that the'tbllowing is a full, clear, and exact description thereof', which will enable others skilled in the art to make and use the saine, reference being had to the accompanying drawing forming part of this specification.

This invention relates to a new and useful improve- -ment in blowers for forcing air for the various purposes for which artificial blasts or currents ot air are rcquired; and

It consists in rotating, in a properly-coilstructcd shell or casing, two elliptical-shaped fans or wings, on separate centers, in such a manner that their surfaces l'oll together air-tight, constantly receiving air, and

forcing it out, as will be hereinafter more fully described.

In the accompanying drawing- Figure 1 isa vertical cross-section of the blower on are fixed on shafts, O O', in the center of the circles of the casing. The form or outline of these wings is seen in g. 1f

The outer sides are arcs of circles, correspond with the casing iu diameter, and work air-tight therewith.

The inner sides of the wings are sinuous in form, but the 'siuuosities of one work air-tight with the outer or circular side of the other, so that the air has no chance to escape at their centers.

Dis an orifice at one end of the casing, through which the air is admitted, seen in the drawing, fig. 1, partly iu dotted line.

E is the orifice through which the air is expelled,` also partly seen in dotted lines.

F represents the frame of the machine, the upper bars ot' which support the shafts ot' the fans, as se'eu in iig. 1.

These shafts are geared together by cog-wheels G H, fig. 2, so that they revolve at a uniform speed.

The power is applied to the shaft C by means of pulley and belt, or in any other suitable manner.,

The wings revolve in the direction ofvthe arrows,

and act alternatclyin sweeping in air through the oritice D, and forcing it out through the orifice E to any point where it may be desired to discharge it.

This is a very simple and cheap 'device'for blowing, and its advantages will be readily understood by all who are acquainted with the subject."

Having thus described1ny ,invention, l

I claim Vas new and desire to 4secure by Letters Patent- 1. As an improvement in fan-blowers, a casing, A,

formed of two equal circular arcs, having their lines of junction in the plane of their common chord, and having inlet and ontleteapertures, D E, in the sides thereof, as shown and described. 2. The two fans B B, arranged on shafts located in the same plane, and each composed of a semi-cylinder rounded off at the diamctrical ends, concaved between said ends and the axis, and rising in a curve over said axis, so that their corresponding siuuosities will always be in contact at some point, and constantly work air-tight together, all as described. v

3. lhe case A, constructed as described, and having side apertures D E, for receiving and discharging air, combined with two fans, B B, or' the form shown, and relatively arranged within the case, as set forth.

HENRY O. MCILWAIN. ALONZO BRUMFIEL.

Witnesses:

SAMUEL Cancun, J ons R. MCOABE. 

